The 2009 Europhysics Conference on High Energy Physics

Search for the rare decay $D^{0} \rightarrow \gamma \gamma$ and improved measurement of $D^{0} \rightarrow \pi^{0} \pi^{0}$

17 Jul 2009, 17:00

15m

Middle Lecture A (Kraków, Poland)

Unified Theories, Strings, Non-perturbative QFT VII. Unified Theories, Strings, Non-perturbative QFT

Speaker

James Morris (The Ohio State University)

Description

We present preliminary results of the search for the doubly-radiative decay $D^{0} \rightarrow \gamma \gamma$ and the measurement of the branching fraction of its associated background $D^{0} \rightarrow \pi^{0}\pi^{0}$ in a data sample corresponding to an integrated luminosity of ~470fb$^{-1}$ collected with the BaBar detector at the PEP-II asymmetric $e^{+} e^{-}$ collider at SLAC. The long-range, FCNC $\gamma \gamma$ decay provides a test for physics beyond the standard model.